Consider a circuit with 8 inverters connected in series. If its output is high, what is the input level?

Question

Consider a circuit with 8 inverters connected in series. If its output is high, what is the input level?

Answer 1

With series inverters, not gates, every 2 inverters is a buffer that will have the same output as its input. The circuit mentioned has 8 inverters which is the equivalent of 4 buffers in series. This means that the input to the circuit will be the same as the output of the circuit. Therefore if the output of this circuit is high that means that the input of this circuit is high as well.